Modelsim is exiting with code 211.

Hi, I experienced the same problem with the free SE version 10.4d, which does not need any special license.

My project is in VHDL, and this is what I had to change to get rid of the crash:

In some design unit there is an output bus using the generic e.g. BUSWIDTH

1. Entity demo is (
2. generic ( BUSWIDTH=8);
3. ..
4. );
5. port (
6. ..
7. data_out: out (BUSWIDTH-1 downto 0) := (others => '0');
8. ..
9. ); end demo;
10. architecture arch of demo is
11. ..
12. subblock_inst : subblock
13. port map (
14. data_out <= data_out(6-1 downto 0),
15. ..
16. );
17. data_out(BUSWIDTH-1 downto 6) <= (others => '0');
18. ..
19. end arch;

Now something like this gave me the error 211 and closing after 10 seconds.

Removing the line 17 gave me an error message about unconnected IO.

Removing the default assignment in line 7 solved the problem in my case (removed ":= (others => '0')"

So it looks like the split bus assignments together with default assignments is problematic